Fueled by a disturbed polar vortex, 18 states and D.C. have had more snow than average into December. In some areas, snowfall ...

A fresh shot of Arctic air could bring the coldest air of the season for many this week, according to AccuWeather ...

The coldest air of the early winter season is blasting the eastern U.S. on Monday, with single-digit temperatures with ...

Arctic wind patterns create a sort of wall around the pole that prevents frigid air from trickling southward. That wall that ...

The current polar vortex event is triggering some of the lowest temperatures of the season and is impacting Americans in ...

Cold temperatures are set to continue into the weekend, but New England will feel another icy blast of Arctic air Sunday ...

"Arctic air will bring near record cold temperatures and dangerous wind chills," the National Weather Service said.

The northern U.S. is bracing for bone-chilling cold as a weakened polar vortex pushes Arctic air south. How cold will ...

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is ...

The polar vortex can commonly be disrupted during the winter and is known to cause an Arctic outbreak in the United States.

Dr. Amy Butler with the National Oceanic and Atmospheric Administration says the early polar vortex disruption is unusual and ...

The northern U.S. is bracing for bone-chilling cold as a weakened polar vortex pushes Arctic air south. How cold will temps ...